CCD漂移扫描观测的模拟方法研究

Research on the Simulation Method for CCD Drift-Scan Observation

CCD漂移扫描技术可以提高地基光电望远镜系统的观测效率,在空间目标观测中有着越来越广泛的应用。利用计算机仿真技术对CCD漂移扫描观测进行模拟,可以为研究其应用提供更为有效的方式。文章首先在分析CCD漂移扫描技术的基础上,建立了漂移扫描观测的数学模型;其次,系统地阐述了以STK(Satellite Tool Kit)为仿真平台的模拟方法,同时对模拟过程中观测天区的选取方法,以及CCD脉冲控制周期对观测效果的影响进行了研究分析;最后,通过仿真实验,验证了该模拟方法的有效性和可行性。

CCD drift-scan technology can improve the survey efficiency of ground-based opto-electrionic telescope systems, and is finding increasing application in space observation. One of the valid methods to study this technology and its applications is to simulate the process of CCD drift-scan survey. This paper analyses the basic principle of CCD drift-scan technology at first, and finds a math expression model on it. Then it expounds on the simulation method, which uses STK（Satellite Tool Kit） as an emulation platform, and introduces the selection measure of observation zone of celestial sphere, which used in the simulation process, this paper also analyses the effect of CCD pulse control period on the star image of survey. Finally, by validating the above analyses through experiments, the simulation method proposed in this paper has been shown to be feasible and effective.